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drm/amd/display: init hw i2c speed

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[Why]
Driver didn't init hw i2c speed cause hdcp hw cannot
send command, because the default value of speed register
is 0x2.

[How]
Restore the default speed when release i2c engine

Signed-off-by: Lewis Huang <Lewis.Huang@amd.com>
Reviewed-by: Tony Cheng <Tony.Cheng@amd.com>
Acked-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Lewis Huang 2020-01-14 11:08:34 +08:00 committed by Alex Deucher
parent 947daab2a2
commit 09f6dd6e6d
2 changed files with 1 additions and 9 deletions
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9
drivers/gpu/drm/amd/display/dc/dce/dce_i2c_hw.c
View file

@ -339,7 +339,7 @@ static void release_engine(
bool safe_to_reset;
/* Restore original HW engine speed */
REG_WRITE(SPEED, dce_i2c_hw->original_speed);
set_speed(dce_i2c_hw, dce_i2c_hw->default_speed);
/* Reset HW engine */
{
@ -371,7 +371,6 @@ struct dce_i2c_hw *acquire_i2c_hw_engine(
{
uint32_t counter = 0;
enum gpio_result result;
uint32_t current_speed;
struct dce_i2c_hw *dce_i2c_hw = NULL;
if (!ddc)
@ -409,11 +408,6 @@ struct dce_i2c_hw *acquire_i2c_hw_engine(
dce_i2c_hw->ddc = ddc;
current_speed = REG_READ(SPEED);
if (current_speed)
dce_i2c_hw->original_speed = current_speed;
if (!setup_engine(dce_i2c_hw)) {
release_engine(dce_i2c_hw);
return NULL;
@ -613,7 +607,6 @@ void dce_i2c_hw_construct(
dce_i2c_hw->buffer_used_bytes = 0;
dce_i2c_hw->transaction_count = 0;
dce_i2c_hw->engine_keep_power_up_count = 1;
dce_i2c_hw->original_speed = DEFAULT_I2C_HW_SPEED;
dce_i2c_hw->default_speed = DEFAULT_I2C_HW_SPEED;
dce_i2c_hw->send_reset_length = 0;
dce_i2c_hw->setup_limit = I2C_SETUP_TIME_LIMIT_DCE;

1
drivers/gpu/drm/amd/display/dc/dce/dce_i2c_hw.h
View file

@ -256,7 +256,6 @@ struct i2c_request_transaction_data {
struct dce_i2c_hw {
struct ddc *ddc;
uint32_t original_speed;
uint32_t engine_keep_power_up_count;
uint32_t transaction_count;
uint32_t buffer_used_bytes;